Philip Rivers, headed to his 122nd consecutive start, will match wits with brainy linebacker London Fletcher, who has started 247 games in a row. Fletcher, 38, has lost some range but still gets up to speed fast. Against Detroit in Week 3, he bluffed a blitz between guard and center, shot through the other guard-center gap and sacked Matthew Stafford 1.7 seconds after the snap.

For all their struggles as part of a team giving up 33 points per game, Redskins defenders have taken back four passes for touchdowns, three in the first half. Hall returned a fumble for a TD.

Their linemen aren't getting off blocks fast (but are asked to defend two gaps rather than one). The best pass-rushers are outside linebackers Ryan Kerrigan (6.5 sacks) and Brian Orakpo (3 sacks, four passes defended), who are versatile blitzers.

Ryan Matthews is coming off two consecutive games with 100 yards rushing, adding a power-speed element to San Diego's offense. The Chargers' offensive line is its healthiest since going into Week Three.